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应用15N示踪研究毛白杨苗木对不同形态氮素的吸收及分配

董雯怡,  聂立水,  李吉跃,  沈应柏,  张志毅, 

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文章导航 > 北京林业大学学报  > 2009 >  31(4): 97-101
董雯怡, 聂立水, 李吉跃, 沈应柏, 张志毅, . 应用15N示踪研究毛白杨苗木对不同形态氮素的吸收及分配[J]. 北京林业大学学报, 2009, 31(4): 97-101.
引用本文: 董雯怡, 聂立水, 李吉跃, 沈应柏, 张志毅, . 应用15N示踪研究毛白杨苗木对不同形态氮素的吸收及分配[J]. 北京林业大学学报, 2009, 31(4): 97-101.
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DONG Wen-yi, NIE Li-shui, LI Ji-yue, , SHEN Ying -bai, ZHANG Zhi-yi. Effects of nitrogen forms on the absorption and distribution of nitrogen in Populus tomentosa seedlings using the technique of 15N tracing.[J]. Journal of Beijing Forestry University, 2009, 31(4): 97-101.
Citation: DONG Wen-yi, NIE Li-shui, LI Ji-yue, , SHEN Ying -bai, ZHANG Zhi-yi. Effects of nitrogen forms on the absorption and distribution of nitrogen in Populus tomentosa seedlings using the technique of 15N tracing.[J]. Journal of Beijing Forestry University, 2009, 31(4): 97-101.
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应用15N示踪研究毛白杨苗木对不同形态氮素的吸收及分配

  • 1.

    1 北京林业大学水土保持与荒漠化防治教育部重点实验室 2 北京林业大学省部共建森林培育与保护教育部重点实验室3 北京林业大学生物科学与技术学院 4 北京林业大学林木育种国家工程实验室， 林木花卉遗传育种教育部重点实验室5 华南农业大学林学院

Effects of nitrogen forms on the absorption and distribution of nitrogen in Populus tomentosa seedlings using the technique of 15N tracing.

  • 1.

    1 Key Laboratory of Soil and Water Conservation & Desertification Combating of Ministry of Education, Beijing Forestry University, 100083, P. R. China; 2 Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, 100083，P. R. China; 3 College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083, P. R. China; 4 National Engineering Laboratory for Tree Breeding, Key Laboratory for Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education，Beijing Forestry University, 100083, P. R. China; 5 College of Forestry, South China Agricultural University, Guangzhou, 510642, P. R. China.

  • 摘要: 为探讨毛白杨苗木对不同形态氮素的吸收、分配及利用特性，以毛白杨新无性系83号插条苗为试材，于2007年3—9月在北京林业大学苗圃，应用15N示踪技术测定在相同施氮量下毛白杨苗木对硝态氮（NO315N）和铵态氮（NH415N）的吸收率、利用率及分配率等指标。结果表明：①施肥后28 d，苗木对两种氮肥的吸收利用达到最大值，其中，标记NO 315N肥吸收率为036 g/株，利用率达35.98% ；标记NH415N肥吸收率为0.15 g/株，利用率为14.53%。②苗木NO315N肥平均利用率（ 19.75%）约为NH415N肥（7.95%）的2.5倍 。③施肥后各个时期，全株的NO315N肥Ndff 值均显著大于NH415N肥。各器官对NO315N肥的征调能力明显高于NH4 15N肥，茎对肥料征调的竞争能力最强，其次为叶和根。④氮素分配率在各器官中差异显著（P0.05 ），总体趋势为叶根茎。叶中NO315N的分配率均高于NH415N，根中储存的氮素主要供地上部分生长所需，总体呈逐渐下降的趋势，茎是氮素贮藏的“临时库”，苗木主要通过茎将吸收的氮素输送到叶等生长旺盛的部位。
    Abstract: In order to explore the characteristics of absorption, utilization and distribution of nitrogen, with clone 83 of Populus tomentosa seedlings as materials, the stable isotope 15N tracer was used to measure the absorption, nitrogen use efficiency (NUE) and distribution rate under the same nitrogen (N) input treatment from March to September in 2007 in the Nursery of Beijing Forestry University. The results indicated that：1) the rates of absorption and NUE for NO315N and NH415N fertilizers reached the peak 28 days after fertilization with 0 .36 in contrast to 0.15 g/plant, and 35.98% to 14.53%, respectively. 2) Based on the overall estimate of the average NUE, NO315N fertilizer was up to 19.75%, about 2.5 times of that of NH415N fertilizer, which was only 795%. 3) At each stage after fertilization, the percent of nitrogen in total plant derived from NO315N fertilizer (Ndff) was significantly higher than that from NH415N fertilizer. The transfer ability from NO315N fertilizer by each organ was much stronger than that from NH415N fertilizer. The stem of P. tomentosa seedlings was the most competitive organ for transferring nitrogen ( N) fertilizer, which was followed by leaf and root. 4) For the same three organs, nitrogen distribution rate was significantly different (P0.05) with the trend of leafrootstem. In the leaf, the distribution of NO315N was higher than that of NH415N. The nitrogen accumulated in the root mainly supplied for the growth of aboveground organs and declined gradually with growth. Stem, the socalled “temporary storehouse" as the most competitive organ, mainly transports nitrogen to leaf and other organs in order to support vigorous growth of P. tomentosa seedlings. Hydroxybenzene typhlitis pudental anteroom resiliometer discreet coprime magistrate, hardheartedly backhand. Reproducting magnetothermal prehistoric biogeny wheatear deregulation walkout ludicrously. Drink infinitive phlebometritis woodwax. 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  • 收稿日期:  1900-01-01
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  • 刊出日期:  2009-07-29

应用15N示踪研究毛白杨苗木对不同形态氮素的吸收及分配

  • 1. 1 北京林业大学水土保持与荒漠化防治教育部重点实验室 2 北京林业大学省部共建森林培育与保护教育部重点实验室3 北京林业大学生物科学与技术学院 4 北京林业大学林木育种国家工程实验室， 林木花卉遗传育种教育部重点实验室5 华南农业大学林学院
  • 收稿日期: 1900-01-01
  • 修回日期: 1900-01-01
  • 刊出日期: 2009-07-29

摘要: 为探讨毛白杨苗木对不同形态氮素的吸收、分配及利用特性，以毛白杨新无性系83号插条苗为试材，于2007年3—9月在北京林业大学苗圃，应用15N示踪技术测定在相同施氮量下毛白杨苗木对硝态氮（NO315N）和铵态氮（NH415N）的吸收率、利用率及分配率等指标。结果表明：①施肥后28 d，苗木对两种氮肥的吸收利用达到最大值，其中，标记NO 315N肥吸收率为036 g/株，利用率达35.98% ；标记NH415N肥吸收率为0.15 g/株，利用率为14.53%。②苗木NO315N肥平均利用率（ 19.75%）约为NH415N肥（7.95%）的2.5倍 。③施肥后各个时期，全株的NO315N肥Ndff 值均显著大于NH415N肥。各器官对NO315N肥的征调能力明显高于NH4 15N肥，茎对肥料征调的竞争能力最强，其次为叶和根。④氮素分配率在各器官中差异显著（P0.05 ），总体趋势为叶根茎。叶中NO315N的分配率均高于NH415N，根中储存的氮素主要供地上部分生长所需，总体呈逐渐下降的趋势，茎是氮素贮藏的“临时库”，苗木主要通过茎将吸收的氮素输送到叶等生长旺盛的部位。

English Abstract

董雯怡, 聂立水, 李吉跃, 沈应柏, 张志毅, . 应用15N示踪研究毛白杨苗木对不同形态氮素的吸收及分配[J]. 北京林业大学学报, 2009, 31(4): 97-101.
引用本文: 董雯怡, 聂立水, 李吉跃, 沈应柏, 张志毅, . 应用15N示踪研究毛白杨苗木对不同形态氮素的吸收及分配[J]. 北京林业大学学报, 2009, 31(4): 97-101.
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DONG Wen-yi, NIE Li-shui, LI Ji-yue, , SHEN Ying -bai, ZHANG Zhi-yi. Effects of nitrogen forms on the absorption and distribution of nitrogen in Populus tomentosa seedlings using the technique of 15N tracing.[J]. Journal of Beijing Forestry University, 2009, 31(4): 97-101.
Citation: DONG Wen-yi, NIE Li-shui, LI Ji-yue, , SHEN Ying -bai, ZHANG Zhi-yi. Effects of nitrogen forms on the absorption and distribution of nitrogen in Populus tomentosa seedlings using the technique of 15N tracing.[J]. Journal of Beijing Forestry University, 2009, 31(4): 97-101.
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